Circuit for monitoring and disabling power supply signals to a m

Details Circuit for monitoring and disabling power supply signals to a m Circuit for monitoring and disabling power supply signals to a m

1995-11-07

1997-11-25

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

307 87, 323276, H02H 318

Patent

active

056918704

ABSTRACT:
A circuit that monitors and disables power supply signals to a microprocessor in a computer system utilizing a main power supply and secondary voltage regulators. The circuit detects whether the voltages supplied by the secondary voltage regulators to the microprocessor fall within a predetermined range that is governed by microprocessor requirements. If a supply voltage falls outside its specified range, the circuit turns on a metal-oxide-silicon field effect transistor (MOSFET) connected between one of the main power supply voltages and ground, effectively shorting the primary supply voltage to ground. This activates fault detection circuitry internal to the main power supply, causing the main power supply to shut down, thereby removing all power supply voltages to the microprocessor.

REFERENCES:
patent: 4827149 (1989-05-01), Yabe
patent: 5173832 (1992-12-01), Giorgetta et al.
Intel.RTM. Pentium.RTM. Pro Family Developer's Manual vol. 1: Specification, p. 11-7 to 11-8, Jan. 1996.

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